Roller-mill.



L. F. LITTLE.

ROLLER WHLL.A

APPLlc/mom'mu mm1. 1915.

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L. F. LITTLE.

-ROLLER MILL. APPLICATION man ma. 1. 1915.

Patentd @8pt 11, 191?.

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Wr 1 Il! I ama/wko@ L. F. LITTLE.

ROLLER MILL.

APPLICATION man MAR. i, 1915.

ym?. Pmntedsept. 11,1917.

@trennung Il A A" LUCIUS FREEMAN LITTLE, F OWENSBORO, KENTUCKY, ASSIGNOR TO THE .ANG-L0` .AMERICAN MILL CO., 0F OWENSBORO, KENTUCKY, A CORPORATION OF KENTUCKY.

ROLLER-MILL.

Speciication'of Letters Patent.

Patented Sept. 11, 1917.

Application led March 1, 1915.. Serial No. 11,266. i

Y' To all whom z'zf may concern Be it known that I, LUcIUs FREEMAN LITTLE, a. citizen of the United States, residing at Owensboro, in the county of Daviess and State of Kentucky, have invented new and useful Improvements in Roller-Mills, of which the following is a specification.

The present invention relates to mills, and particularly that vtype known as roller mills, which are characterized by breaks for initially comminuting` the grain; bolting reels or dressers for bolting out the flour or finished productv from the stock; and re-y duction rolls which further reduce the stock, so that the finished product, namely, the flour, and the residue or tailings are finally delivered from the mill in proper condition, themill being of the self-contained type with the breaking, reducing, and bolting instrumentalities all housed within the mill casing, and so related as that they will take the grain from the hopper, break, reduce,

and bolt it, and deliver the finished product.

The present invention has to do with means for so handling the stock, a-nd particularly the fine middlings from the bolting reels, that -the transfer of the stock from one to the other of the various instrumentalities' for reducing it will be facilitated and increase the eiiiciency and output of the mill; this being accomplished by so routing the stock through the mill and the milling instrumentalities as to reduce to a considerable extent the period' of reduction of a given amount of grain.

In the drawings which accompany and form a part of this specification, I have illustrated one embodiment of my invention, and in said drawings- Figure 1 is a vertical sectional view of a roller mill constructed in accordance with my invention.

Fig. 2 is a vertical section of the mill on the line 34-3, Fig. 1.

Fig. 3 is a vertical section of the mill on the line 2 2, Fig. 1.

Referring to the drawings by numbers, like numbers indicating like parts in the several views, 10indicates the mill frame or housing within which are placed the breaking, reducing, and bolting instrumentalities, any suitable drive mechanism tion rolls, centrifugal dressers, and conveyers being provided. The first break 11 consists of any suitable breaking rolls, into which the grain will be fed from any suitable feeding device or hopper 12.

The broken or comminuted grain is delivered from the break rolls 11 to a shaking screen or scalper 13, which screens out the fine stock and delivers it to a conveyer 14 which carries it to a bolting reel having a .fine mesh dressing section 15, and a coarse mesh dressing section 1G, the two being divided by a suitable partition 17. In the bolting reel the flour is dressed out of the fine mesh section 15, while in the coarse mesh section 16 the fine middlings are dressed out, the residue or coarse middlings tailing over to a suitable chute 18, through which they are delivered to a conveyer 19 and carried to the first reduction rolls 20, from which they are carried by a conveyer 47 operating in a suitable trough to the centrifugal dresser 21 for the first reduction rolls, the Hour is bolted out, and the scalped middlings fall to a conveyer presently to be described. The trough 50 in which the con'- veyer y19 is located terminates in a hopper 51 which delivers to the reduction rolls 20.

The stock which passes over the screen 13 falls to a suitable feed plate 22, and thence to a second break 23, where it is further re.- duced, and'by a conveyer 24 is delivered to a second boltin'g reel 2-5, which dresses out the fiour, the line middlings and the course middlings, and delivers the tailings, which are finished broad bran, to a spout by which they are delivered to the sacking point.

The ne middlings from the line grits ganze section 16 of the first bolting reel are delivered to a receptacle 26, from which they are swept by the blade 27 to a feed board 28, down which they pass to a second feed board 29, and thence to the conveyer 30, by which they are carried across to an elevator 31 which lifts the middlings to a delivery spout 32 leading to a hopper 49 delivering to the second reduction rolls 33, so that the fine middlings pass directly from the first bolting reel to the second 'reduction rolls.

The bolting reel 25 for the second break 23 is provided with a fine middlings recep- 'tacle 34, which extends over a relatively short section of the grits ganze portion of the reel, which section is of relatively fine grits gauze and is adjacent the fiour dressing section, as shown in Fig. 1, so that as the stock passes from the flour dressing section to the middlings section, such fine middlings as remain in the stock coming from the second break 23 will be delivered to the fine middlings receptacle 34, from which, as shown in Fig. 2, thel sweeper 35 on the centrifugal dresser will sweep the fine middlings and deliver them over the top of the coarse middlings conveyer 19, over which the receptacle 34 arches, through the aperture in the feed board 36, from which they will fall to the feed board 29 and be delivered to the conveyer 30, together with the fine middlings from the bolting reely for the first break, hereinbefore described, andby the conveyer 30 delivered to the elevator 31 and thence to the second reduction rolls.

The bolting reel 25 has at its extreme end a section of relatively coarse grits gauze which bolts out the coarse middlings and these fall into the conveyer 19 and pass to the first reduction rolls, with the overtails coming from the dresser 16 by the spout 18, as hcreinbefore described.

It will be seen from the foregoing that the bolting reels for the first and second breaks and the first reduction rolls take out the fiour from the stock and deliver the fine middlings directly to the' conveyer 30, which, in turn carries them to the elevator 31 by which they are sent t-o the second reduction rolls 33, from which they are carried by a conveyer 48 operating in a suitable trough to the centrifugal dresser 46 for the second reduction rolls, which dresses out the flour in the Hour section and delivers it to the 'fiour hopper 38, the cut-off section of this reel being arranged so a second grade flour may be taken off and spouted direct to the bagging point, the shorts or finish being tailed out of the reel.

In order to adapt the mill for a different routing of the stock from that just described, if this should be found desirable, I preferably hinge the feed board 36 so that it may be swung to the position shown in dotted lines in Fig. 2, a latch or stop 41 being provided to maintain it in this position, while the latch 42 holds it in. its uppermost position (full lines Fig. 2).

lVhen'in the position shown in dotted lines in Fig. 2, the fine middlings coming from the first break dresser 16 over the feed board 28 will be directed to the conveyer 19 and by it delivered to the first reduction rolls instead of passing to the conveyer 30, as hereinbefore described. The board 36 when in the position shown in dotted lines will have its aperture through which the middlings from the second break pass, when it is in position for routing the flour as above described, closed by means of a small gate 43 pivotally mounted on the board and having a latch 44 by means of which it may be secured, this gate 43, when the board 36 is in the full line position shown in Fig. 2, hanging in the vertical position shown. Vhen the board 36 is in theA dotted line position for delivering middlingsto the conveyer 19, the arched'portion 45 of the receptacle 34 will be removed so as to open the conveyer throughoutits entire length, this arched portion being separable from the rest of the receptacle so that it may be readily inserted or placed in position to adapt the mill to the different routing of.the material. From the first reduction rolls the middlings will then pass tothe dresser 21 for the first reduction roll s,`where they will be bolted and the middlings will be delivered to conveyer 30, and by it carried to elevator 31 which will deliver them to the second reduction rolls and its dresser for final grinding and dressing.

In a mill constructed in accordance with this disclosure, a better grading of mid'- vdlings is secured and a material saving in time is effected by routing the stock so as to take the fine middlin s from the breaks direct to suitable reductlon rolls and eliminating unnecessary handling of them .after they have been once brought to proper conditionfor treatment by the rolls. It results not only in shortening the period'of vtime within which a given quantity of grain may be milled, but the better graded middlings also insures a maximum amount of flour.

Various changes in mechanical structure may be 'made' without departing from the principle of my invention.

I claim 1. In a mill, the combination of a pair of break rolls, a centrifugal dresser to receive the product from said break rolls and dress out the fiour and the fine middlings, y

first and secondsets of reduction rolls, means to deliver the fine middlings directly to one set of reduction rolls, and means to deliver the coarse middlings to the other set and then to said first set of reduction rolls.

2. In a mill, the combination of a pair of break rolls, a centrifugal dresser to receive the product from said break rolls and dress out the fiour and the fine middlings, a second set of break rolls, means to deliver part of the product to said centrifugal dresser and the overtails from said first break to said second break, a centrifugal dresser to receive the product from said second set of break rolls and dress out the fiour and the fine middlings, two sets of reduction rolls, means to deliver the .fine middlings from the dressers for. the first and second breaks directly to one set of reduction rolls, and means to deliver the coarse middlings to the other set. i

3. In a mill, the combination of a pair of break rolls, a centrifugal dresser to receive the product from said break rolls and dress out the flour and the fine iniddlings, a conveyer to Which the fine middlings are delivered, a second set of break rolls, means to deliver part of the product to 'said centrifugal dresser and the overtails of said first break to said second break, a centrifugal dresser to receive the product from said second set of break rolls and dress out the Hour and the fine middlings and deliver said fine middlings to said conveyer', t\vo sets of reduction rolls, means to which said conveyer delivers te carry the ine middlings directly to one set of reduction rolls, and means to deliver the coarse middlings to the other set.

4. In a mill, the combinationA of a pair of break rolls, a centrifugal dresser to receive the product from said break rolls and dress out the flour and the fine middlings, a conveyer to which the fine middlings are delivered, a second set of break rolls, means to deliver part of the product to said centrifugal dresser and the overtails of said first break to the second break, a centrifugal dresser to receive the product from said second set of break rolls and dress out the flour and the line middlings and deliver said fine middlings to said conveyer, two sets of reduction rolls, means to which said conveyer delivers to carry the fine middlings Idirectly to one set of reduction rolls, and means to deliver the coarse middlingsto the other set.

5. In a mill, the combination of a pair of break rolls, a centrifugal dresser to receive thel product of said break rolls and dress out the flourand the fine middlings, a sec-` ond pair of break rolls, means to deliver part of the product from said .first pair of break rolls to said centrifugal dresser and the overtails from said first break to said `second break, a centrifugal dresser to receive the product from said second pair of break rolls and dress out the `flour and the fine middlings, a conveyer which receives the coarse middlings from said centrifugal dresser, a set of reduction rolls to which said conveyer delivers, a centrifugal dresser for said reduction rolls to dress out the flour and the fine middlings, and conveying means for said line middlings to which saidcentrifugal dressers deliver ivhich carries the fine middlings directlyT to a second set of reduction rolls.

6. In a mill, the combination of a pair of break rolls; a centrifugaldresser to receive the product from said break rolls, dress out the flour and the fine middlings and deliver the overtails to a suitable conveyer; a second pair of break rolls, means to deliver part of the product from said first pairof break rolls to said centrifugal dresser and the overtails from said first break to said second break; a centrifugal dresser to re ceive the product from said second pair of break rolls, said dresser having a flour-producing section, a fine middlings section and a coarse middlings section; a set of second reduction rolls; a conveyer to which the fine middlings sections of said centrifugal dressers deliver to carry the fine middlings directlyy to said second reduction rolls; a set of first reduction rolls; means for conveying the coarse middlings from the first and second break dressers to said set of first reduction rolls; and a centrifugal dresser to receive the product from said set of rst reduction rolls, dress out the flour and de liver the fine iniddlings to said lirst-named v conveyer.

7. In a mill, the combination of two pairs of break rolls, a centrifugal dresser for each pair of break rolls and each of which has a flour-producing section, means to deliver the product from the first pair of break rolls to the centrifugal dresser for said pair of break rolls and the overtails to the second set of break rolls for the second centrifugal dresser and a fine middlings pro ducing section, two sets of reduction rolls, conveying means to deliver the fine middlings from said dressers directly te the second set of reduction rolls, conveying means -to deliver t-he overtails of said dressers to the first set of reduction rolls, and a oentrifugal dresser for each of said reduction rolls.

8; In a mill, the combination of two pairs of break rolls, a centrifugal dresser for each pair of break rolls and each` of which has a l Hour-producing section and a fine middlings producing section, means to deliver part of the product from the first set of break `rolls to the centrifugal dresser therefor and the overtails to the second set of break rolls, two sets of reduction rolls, conveying means common te both of said dressers to receive the fine middlings and deliver them directly to the second set of reduction rolls, and conveying` means common to both dressers to receive and deliver the coarse middlings to the first set of reduction rolls.

9. In a mill, the combination of two pairs of break rolls, a centrifugal dresser foreach pair of breakolls and each of which has a Hour-producing section and a ne middlings producing section, means to deliver part of the product from the first pair of break rolls to the centrifugal dresser therefor and the overtails to the second sct of breaks, two sets of reduction rolls, conveying means common to both of said dressers to receive the fine middlings and deliver them directly to the second set of reduction rolls, conveying means common to both dressers to receive and deliver the coarse middlings to the first set of reduction rolls, and a centrifugal dresser to receive the product from said second set of reduction rolls.

10. In a mill, the combination with a plurality of break rolls, and a plurality of reduction rolls, of a plurality of centrifugal dressers to dress out the Hour andmiddlings in the stock coming fromsaid rolls, a conveyer to receive the fine middlings from the. dressers and deliver them directly to a predetermined point, and conveying means to deliver the coarse middlings from said dressers to :mother predetermined point` Without mixing the said fine and coarse middlings.

11. In a mill, the combination of two pairs of break rolls, means t'o deliver the overtails from one pair of breaks tothe other pair, a centrifugal dresser for each pair of rolls, a line middlings conveyer, means for delivering the fine middlings from said dressers to said conveyer, tWo sets of reduction rolls, an elevator which takes the fine middlings from said middlings conveyer and directly delivers it through a suitable feed spout to a set of reduction rolls, and a conveyer which takes the overtails from said dressers and delivers them to the other set of said reduction rolls and then to the first-mentioned set of' rolls.

12. In a mill, the combination of a pairof break rolls, a centrifugal dresser to receive the product of said rolls, a series of feed boards to deliver the fine middlings from said dresser to a middlings conveyer, a seeond pair of break rolls, means to deliver the overtails from the first pair of break rolls to the second pair of break rolls, a centrifugal dresser for said rolls, a middlings conveyer for said second dresser to receive the coarse middlings, and means for delivering the fine middlings from said second break dresser to the fine middlings conveyer for the first break dresser.

13. In a mill, the combination of a pair of break rolls, a centrifugal dresser to receive the product of said rolls, a series of feed boards to deliver the line middlings from said dresser to a middlings conveyer, a sec ond pair of break rolls, means to deliver the overtails from the first pair of breaks to the second pair of breaks, a centrifugal dresser for said rolls, a middlings conveyer for said second dresser to receive the coarse middlings, and means for delivering the fine middlings from said second break dresser to the line' middlings conveyer for the rst break dresser comprising a feed board covering a portion of the middlings conveyer for the second break dresser.

14. In a mill, the combination of a pair of break rolls, a centrifugal dresser to receive the product of said rolls, a series of feed boards to deliver the fine middlings from said dresser to a middlings conveyer, a seeond pair of break rolls, means to deliver the overtails from the first pair ofy breaks to the second pair of breaks, a centrifugal dresser for said rolls, a middlings conveyer for said second dresser to receive the coarse middlings, and means for delivering the fine middlings from said second break dresser to the fine middlings conveyer for the first break dresser comprising an arched feed board covering a portion of the middlings conveyer for the second break dresser.

15. In a mill, the combination of a pair of break rolls, a centrifugal dresser to receive the product of said rolls, a series of feed boards to deliver the fine middlings from said dresser to a middlings conveyer, a second pair of break rolls, means to deliver the overtails from the first pair of breaks to the second pair of breaks, a centrifugal dresser for said rolls, a middlings conveyer for said second'dresser to receive the coarse middlings, and means for delivering the fine middlings from said second break dresser to the fine middlings conveyer for the first break dresser comprising a removable archedfeed board covering a portion of the middlings conveyer for the second break dresser.

1G. In a mill, the combination of a pair of break rolls, a centrifugal dresser to receive the product of said rolls, a series of feed boards to deliver the fine middlings from said dresser to a middlings conveyer, a second pair of break rolls, means to deliver the overtails from the first pair of breaks to the second pair of breaks, a centrifugal dresser for said rolls, a middlings conveyer for said second break dresser to receive the coarse middlings, means for delivering the fine middlings from said second break dresser to the fine middlings conveyer for the first break dresser, and means to interrupt theflo'W from said first break dresser and direct it to the conveyer. for said second break dresser When desired.

17. In a mill, the combination of a pair of break rolls, a centrifugal dresser to receive the product of said rolls, a series cf feed boards to deliver the fine middlings from said dresser to a middlings conveyer, a second pair of break rolls, means to deliver the overtails from the first pair of breaks to the second pair of breaks, a centrifugal dresser for said rolls', a middlings conveyer for said second break dresser to receive the coarse middlings, means for delivering the fine feed-boards to deliver the line middlings from said dresser to a middlings conveyer, a second pair of break rolls, means to deliver the overtails from the first pair of breaks to the second pair of breaks, a centrifugal dresser for said rolls, a middlings conveyer for said second break dresser to receive the coarse middlings, and means for delivering the fine middlings 4from said second break dresser to the fine middlings conveyer for the rst break dresser, one of the series of said feed boards having a gateclosed aperture and being shiftable to direct the middlings from said first dresser to either ofvsaid conveyers.

19. In a mill, the combination of a centrifugal dresser, a set of reduction rolls, a fine middlings conveyer for delivering the mid'- dlings from said dresser to said reduction rolls, a second centrifugal dresser, and a second set of reduction rolls, and a middlings conveyer for delivering the coarse middlings from said second dresser to said second set of reduction rolls, and a feed-board from said lirst dresser direct to one or the other of said conveyers and having an aperture therein through which the flow of fine middlings of the second dresser passes when the feed-board is in one position.

21. In a mill, the combination of two pairs of break rolls, a centrifugal dresser for each pair of break rolls, two sets of reduction rolls, a centrifugal dresser for each set of reductionrolls, means/for delivering the fine middlingsfrom the centrifugal dressers for the two pairs of break rolls directly to one set of reduction rolls, and means for delivering the coarse middlings from the centrifugal dressers for the two pairs of break rolls directly to the other set of reduction rolls.

22. In a mill, the combination of two pairs of break rolls, a centrifugal dresser for each pair 0f break rolls, two sets of reduction rolls, a centrifugal dresser for each set of reduction rolls, means for delivering the coarse middlings from the centrifugal dressers for the two pairs of break rolls directly to one set of reduction rolls, and means for delivering the scalped middlings from the last mentioned reduction rolls, together with the ne middlings from the centrifugal dressers for the two pairs of break rolls to the other set of reduction rolls.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses. .f

LUCIUS FREEMAN LITTLE.

Witnesses:

GERTRUDE M. STUCKER,

C. H. Fnsnnn.` 

